Nearby Harbors
41.1867’ N, 71.5783’ W

Block Island, RI

76°
H -°
L 58°
W
3mph
Low tide
8:31 pm
Photo Credits

Tides Today & Tomorrow in Block Island, RI

TIDE TIMES for Friday, September 18, 2026
The tide is currently falling in Block Island, RI.
Next low tide : in 4h 06m at 8:31 pm (1.0 ft)
Next high tide (tomorrow) : 1:53 am (2.1 ft)
Sunset today : 6:50 pm
Sunrise tomorrow : 6:30 am
Moon phase : First Quarter (48% illuminated)
Tide Station Location : Station #8459338
Common Questions About Tides

Featured Local Businesses

New Harbor Great Salt Pond Block Island Aerial

New Shoreham (Block Island) Harbormaster
Champlins Marina Resort, docks filled on a sunny summer day

Champlin's Marina & Resort
Coast Guard Station, Point Judith Rhode Island,

USCG Station Point Judith, RI
Beach in East Hampton, NY -- Nicole Mayone, CC BY-SA 2.0 , via Wikimedia Commons

East Hampton Harbormaster

Block Island, RI Tides - Apr 1861

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Mon12:162.56:410.26:110.25:326:15Third Quarter1Mon
2Tue12:552.81:222.47:510.37:550.45:316:16Third Quarter2Tue
3Wed2:062.62:332.48:550.39:120.45:296:17Third Quarter3Wed
4Thu3:162.63:422.59:500.310:130.35:286:18Waning Crescent4Thu
5Fri4:162.64:372.610:350.311:020.25:266:19Waning Crescent5Fri
6Sat5:042.65:232.811:120.211:440.25:246:20Waning Crescent6Sat
7Sun5:452.66:033.011:440.15:236:21Waning Crescent7Sun
8Mon6:222.76:383.112:220.112:120.05:216:22New Moon8Mon
9Tue6:572.77:103.112:570.012:37-0.15:196:23New Moon9Tue
10Wed7:302.77:403.21:300.01:04-0.15:186:24New Moon10Wed
11Thu8:032.78:103.12:010.01:33-0.15:166:25New Moon11Thu
12Fri8:362.68:423.02:300.02:050.05:156:26Waxing Crescent12Fri
13Sat9:112.59:172.92:580.12:390.15:136:28Waxing Crescent13Sat
14Sun9:502.49:572.83:290.33:160.25:116:29Waxing Crescent14Sun
15Mon10:342.310:432.74:060.43:580.35:106:30Waxing Crescent15Mon
16Tue11:252.211:372.74:540.54:480.45:086:31First Quarter16Tue
17Wed12:212.35:580.65:500.55:076:32First Quarter17Wed
18Thu12:352.61:222.47:210.57:040.55:056:33First Quarter18Thu
19Fri1:392.72:282.68:350.48:300.35:046:34First Quarter19Fri
20Sat2:482.73:342.99:300.19:510.15:026:35Waxing Gibbous20Sat
21Sun3:552.94:323.310:17-0.110:53-0.25:016:36Waxing Gibbous21Sun
22Mon4:543.15:243.711:01-0.311:49-0.44:596:37Waxing Gibbous22Mon
23Tue5:473.26:144.011:45-0.54:586:38Full Moon23Tue
24Wed6:383.37:044.212:42-0.612:30-0.64:566:39Full Moon24Wed
25Thu7:293.37:544.21:34-0.71:16-0.64:556:40Full Moon25Thu
26Fri8:193.38:444.12:24-0.72:03-0.54:546:41Waning Gibbous26Fri
27Sat9:103.19:373.83:15-0.52:50-0.44:526:42Waning Gibbous27Sat
28Sun10:033.010:323.54:08-0.33:39-0.14:516:43Waning Gibbous28Sun
29Mon10:592.811:303.25:090.04:380.24:496:45Waning Gibbous29Mon
30Tue11:592.76:140.26:070.44:486:46Third Quarter30Tue
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8459338)

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Common Questions About Block Island, RI Tides

Collapse All
Is this week a spring tide or neap tide in Block Island, RI?

Block Island, RI is currently in a neap phase. Tonight's moon is 48% illuminated. Spring tides (largest swings) occur near new and full moons; neap tides (smallest swings) occur near first and third quarter moons. Tidal ranges this week are near their weekly minimum.

What datum are Block Island, RI tide heights measured from?

Tide heights on this page are measured from Mean Lower Low Water (MLLW), the U.S. NOAA standard. A height of 0 ft represents the 19-year average of each day's lower low tide. Negative values indicate a "minus tide" — water levels below that long-term reference.

What factors can affect the tide predictions for Block Island, RI?

Tide predictions for Block Island, RI come from NOAA's harmonic analysis and are typically accurate within about ±10 minutes on timing and ±0.5 ft on height. Actual water levels can deviate further due to sustained winds, atmospheric pressure changes, river flow, and storm surge. During major weather events, be sure to check US Harbors weather pages for factors that could impact tidal predictions.

Which NOAA station provides tide data for Block Island, RI?

Tide data for Block Island, RI is sourced from NOAA Station #8459338. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8459338.

What is the moon phase in Block Island, RI tonight?

Tonight the moon over Block Island, RI is First Quarter (48% illuminated). This places Block Island, RI in a neap tide cycle, so tidal ranges are near their weekly minimum this week.

US Harbors Tidal Data

The data in our tide charts, tide tables, and tide graphs is provided by NOAA and others. These predictions are derived mathematically from numerous inputs, including data from historical tide stations and nearby locations where sensors are actively recording. As shown in the tide graph at the top of this page, “Predicted” tides (blue) are what forecasting models expect to happen. “Observed” tides (red) are those recorded by local sensors in real time, overlaid on the predictions for direct comparison. We display Observed water levels for a select group of harbors including Portland, Maine, where a physical sensor monitors water levels in real time.

LEARN MORE ABOUT OUR TIDE DATA

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